I don't understand what a lot of people write about their Tango: it's my probably my favourite D/W program

Same here... I thought it was a perfection expression of the tango, yet still faithful to their own personal style. The tango, Samson and Delilah, Borodin.... all magical. I was merely unhappy with their music choices in recent years (too safe, not enough experimenting), but no complaints about the quality of their skating and improvements - they are simply brilliant.